Printing-press



F."s. ENGLISH. Pmmme PRESS. APPLICATION FILED JUNE 30, I919.

Patented Apr, 19-, 1921.

4 5 SHEETS-SHEET I.

F. S. ENGLISH.

PRINTING PRESS.

APPLICATION FILED JUNE '30. 1919.

1,375,450. Patented Apr. 19, 1921.

Im= 5&Sl1HEE-SHEET2. Q "W 5% ('lbtozmua F. S. ENGLISH.

PRINTING PRESS. APPLICATION FILED JUNE 30, I9I9v Patented Apr. 19, 1921.

5 SHEETSSHEET 3.

alike L142 F. S. ENGLISH. PRINTING PRESS. APPLICATION FILED JUNE 30. 19:9.

- Patented Apr. 19, 1921. I

a mum um F. S. ENGLISH. PRINTIN APPLICATION FIL G PRESS. ED xuus'ao, 1919.

Patented Apr. 19, 192 1.-

5 SHEETS-SHEET 5- i'i'E STAEEES PAFEN E FRED S. ENGLISH, OF NEW IDNDON, CONNECTICUT.

PRINTING-PRESS.

Specification of Letters Patent. Patented Apr, 19, 1921,

Application filed June 30, 1919. Serial No. 307,789.

To all whom it may concern:

Be it known that I, FRED S. ENGLISH, a citizen of the United States, and a resident of New London, in thecounty of New London and State of Connecticut, have invented jacket may be quickly detached from and attached to thecylinder.

In some classes of work such as in cutting and scoring heavy stock or cardboard from which boxes are to be made, it is necessary to prepare a matrix for the cutting and scoring form, which matrix usually consists of a sheet of manila stock glued to the jacket and which is routed out so that the scoring rules can press thecardboard into the matrix in order to score it on the lines where folds or creases are to be made for shaping the stock into a box or other shape.

In many cases the routing of the matrix takes considerable time, in some cases a day or even more and heretofore it has been customary to do this routing on the printing press and the press remained idle while the matrix was being prepared. The object of the present invention is to providea jacket for the printing press cylinder which can be removed from the cylinder and replaced. The advantage of this is that two or more jackets may be provided for the press, whereby one may be temporarily removed for the preparation of the cutting and scoring matrixwhile another is being used on the press for a different job. The method of preparing the matrix'o-f a separate or removable jacket and its advantages are more fully described in the application of Charles W. Britcher, Ser. No. 307,810. The present invention may be utilized for purposes other than carrying out the method therein described. 7

As stated, in the present case the jacket is quickly removable bodily from the print-' ing press cylinder. In the fullest embodiment of my invention the j acketis not only quickly detachable from the cylinder but it is also adapted to be swung on a. hinge joint at one end'so that access may be had to the undersideof the jacket for the placing of make ready between the cylinder and jacket where it is not desired to entirely detach the jacket. In this respect my invention embodies both the quick detachable and the hinged features; These advantages are obtained with simple and inexpensive elements which necessitate no modification of the ordinary presses now in use.

While I have described my invention as applied to a printing press it will be obvious that it is adapted for presses which are made for cutting and scoring only, or on a printing press from which the inking devices have been removed and I desire it understood that I claim the invention as:

applied to such other presses.

In the drawings forming part of this application,

Figure lis a side elevation of a two revolution printing press containing my invention, in which view many parts of the mechanism of the press are omitted,

Fig. 2 is an end elevation of part of the impression cylinder showingthe jacket and the means for attaching it to the cylinder,

Fig. 3 is an enlarged detail View of the means for securing the leading end of the jacket, and the means for stripping the sheets from the cylinder,

Fig. i is a similar view showing another form of sheet stripping device,

. Figs. 5and 6 are plan views showing the means for attaching the ends of the jacket 7 to the cylinder, 4

Pg. 7 is a sectional view of the, cylinder showing a further development of the jacket attaching means topermit swinging as well as rapid detachment of the jacket, and Fig. 8 is a front elevation of the parts shown in Fig. 7. I

In Fig. 1 I have shown the press frame 1, a feed table 2, the bed 3, the sheet delivery device 4, and the impression cylinder 5 of an ordinary two revolution printing press. The present invention relates to the attachment of the jacket to the impression cylinder.

In two revolution presses the impression portion of the cylinder comprises about one half of the whole periphery and this impression portion for some kinds of work is covered with a hard steel jacket consisting of a sheet adapted to be drawn tightly against the surface of the cylinder. In the drawings I have shown a jacket 5 of this character the top of which is slightly below the surface of the cylinder bearers 6 before make ready is supplied. The leading end of the jacket or that end which first ap proaches the form in printing is provided with a block or strip 7 extending across the front edge of the jacket and which is secured to the latter by means of screws 8 or by any, other means of attachment. In Figs. 1'to"4, the strip 7 has a flat surface which abuts against the front edge 9 of the cylindershell 10,-which surface 9 is generally cut on the radius of the cylinder. The strip 7 has apertures in one face to receive dowel pins 11 which projectfrom thesurface 9 of the cylinder, so that the strip 7 may be held in place by the dowel pins. The top surface 12 of the strip 7 is inclined relatively to the periphery of the cylinder and the edge of the jacket is bent slightly inwardly at 13 tolie against the surface 12 and thus be within the peripheral line of the cylinder.

There is a shaft 14 mounted on the cylinder and it corresponds with and may be operated in the same manner as the ordinary tynipan shaft in common use.

This shaft 14 carries the clamps 15 which reach outwardly and clamp against one surface of the strip 7 for the purpose of pressing the strip against the cylinder surface 9 to prerentthe strip 7 from disengaging from the dowel pins 11.

In the drawings I have shown the arms 15 clamped tightly against the strip 7. To release these arms a wrench 16 is inserted into the lever arm 17 which is keyed to the shaft 14 and the arm'17 is then sprung over the pin 18.

' The other or back end of the jacket is fastened by turnbuckle s. I have shown blocks 19 secured against the edge 20 of the cylin der by means of screws 21, and these blocks carry book pins 22. There 1s a lining strip 23 secured to the rear end of the jacket and one member 24 of each turnbuckle is bolted to the jacket at this strip. The other member of each turnbuckle has a hook 25 for engaging one of the pins 22. The turnbuckle may betightened or loosened by means of the nut 26.

In Figs. 2. and. 5 I have simply shown the gripper fingers 27 mounted on the gripper shaft 28, with no means for stripping the sheet from the cylinder. In Fig. 3 I have shown the gripper finger broken away. In addition, I have shown a shaft 29 journaled in the clamping arms 15 and this shaft carries sheet lifting fingers 30 which lie under the forward edge of the sheet and are raised just as the grippers 27 are released, inorder to raise the forward edge of the sheet. In Fig. 4 I have shown the lifters 31 mounted on a shaft 82 which is j ournaled in the cylinder itself. I have also shown stripper fingers 33 mounted on a shaft 34 and these fingers are lowered periodically to engage under the edge of the sheet to strip it from the cylinder.

Operation: To attach the jacket to the cylinder the strip 7 is placed over the dowel pins 11 'andag'ainst the surface 9. The arms 15 are then clamped tightly against the strip l. The forward end of the jacket is now firmly secured. The jacket is pressed around thecylinder and the hooks 25 are engaged with the pins 22. The nuts 26 are then turned to tighten the gturnbuckles and this draws the jacket tightly against the surface of the cylinder. To remove the jacket these operations are reversed, whereupon the jacket may be entirely removed from the press and transferred to'a dummy cylinder as set forth in said application of Charles V. Britcher. v I

In Figs. 7 and 8 I have shown a device which permits either the swinging of the jacket or its rapid detachment. In this construction to the forward end of the jacket 35 is permanently secured a strip 36, but instead of dowel pins to lock this strip I provide a shoulder 37 in the edge 38 of the cylinder and the face of the strip has a shoulder 39' which locks under the shoulder 37. The arms 15 for clamping the strip 36 are the same asthearms in the first construction. The strip 36 is provided at. the ends with projecting pintles 40 (it being understood that the construction is thesame at both sides of the press) which are journaled in the U shaped socket 41 inthe arms 42. Thelatter are'loosely mounted on the shaft 14. There is a lockscrew 43 which prevents the pintle 40 from rising out of the, socket 41 and the .pintle may be released by loosening this screw. 2

cylinder. There is an arm 46 integral with the hub 44 and its forward end ispressed upwardly by a spring 47 which lies between this "arm and a lug 48 on the cylinder. The

pin 49 in the cylinder serves as a stop, to

-limit the swingof-thearm 42. The other or rear end of the jacket (not shown) is secured by turnbuckles the same as in the first construction.

Operation: The device last described is shown in the/drawings ready in cutting and scoring. Tosrelease the jacket in order to swing it up from thecylinderlthe turnbuckles (as shown in Figs; 2 and 6:) are first'loosenedand the hooks-25 are removed from the pins 22. 'As the rear end of the jacket is now released the pressure of the springs 47 on the arms 46 will swing the hubs 44 and arms "42 over sufiiciently to disengagethe shoulder39 of the strip 36 from' the shoulder 37 ofthe cylinder. The jacket 35 may'now be swung on the pintles 40 as 'a pivot, for the purpose of inserting the make ready padding under the jacket or for any other purpose. The jacket will, of course, remain connected with the cylinder through the pintles 40. In some cases it may be desirable to disengage the acket from the cylinder entirely, either to get the make ready up close to the leading edge of the jacket, or to change the jacket in carrying out the method described in said application of Charles W. Britcher. In that case, the screws 43 are given a turn or two to release the pintles from the sockets a1 and then the jacket together with the strip 36 may be lifted oif the cylinder and removed from the press. It is obvious that these opera tions are simply reversed when the jacket is to be returned and tightened.

So far as I am aware this is the first case where a metal jacket has been secured to the cylinder so that it can be entirely detached quickly.

Having described my invention, what I claim is:

1. In a printing press the combination with the impression cylinder, of a jacket for the impression portion thereof, a strip secured to the leading end of the jacket, and adapted to lie inside the peripheral line of said cylinder, dowel pins at the forward edge of the impression portion of the cylinder adapted to enter said strip, clamps for holding said strip engaged with said dowel pins, and detachable means for securing the rear end of said jacket to the cylinder.

2. In a printing press the combination with the impression cylinder, of a jacket for the impression portion thereof, a cross strip on the leading end of the jacket, pintles on the ends of said strip, hinge sockets carried by the cylinder and in which said pintles engage, quick detachable means for holding said plntles in said sockets whereby the jacket may be swung on said pintles or be quickly detached from the cylinder, and means for detachably securing the rear end of the jacket to the cylinder.

3. In a printing press the combination with the impression cylinder, having a looking shoulder on the forward edge of its impression portion, a jacket for the cylinder having a cross strip at the leading end, provided with a shoulder adapted to lock on said first shoulder, pintles on the ends of said strips, rocking arms carried by the cylinder and having sockets to receive said pintles, detachable means for holding said pintles in said sockets, spring means for disengaging said locking shoulders topermit said jacket to swing, and means for securing the rear end of the jacket to the cylinder.

4. In a printing press. the combination with the impression cylinder, of a jacket for the impression portion thereof, hinge members on the leading edge of said jacket, hinge members on the cylinder with which said first hinge members cooperate and from which they may be quickly detached, said 7 hinge members forming a hinge connection between the jacket and cylinder whereby the jacket may be swung in relation to the cylinder or be quickly detached therefrom, and means for securing the rear end of the jacket to the cylinder.

Signed at New London in the county of New London and State 01' Connecticut, this 19th day of May, 1919.

FRED S. ENGLISH. 

